python - pip 安装qrcode 错误,不知道该怎么解决,急求?

E:\Osmo\static\qrcode-5.1>pip install qrcode
You are using pip version 7.0.3, however version 8.1.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' comm
and.
Collecting qrcode
Exception:
Traceback (most recent call last):
  File "D:\Anaconda\lib\site-packages\pip\basecommand.py", line 223, in main
    status = self.run(options, args)
  File "D:\Anaconda\lib\site-packages\pip\commands\install.py", line 280, in run

    requirement_set.prepare_files(finder)
  File "D:\Anaconda\lib\site-packages\pip\req\req_set.py", line 317, in prepare_
files
    functools.partial(self._prepare_file, finder))
  File "D:\Anaconda\lib\site-packages\pip\req\req_set.py", line 304, in _walk_re
q_to_install
    more_reqs = handler(req_to_install)
  File "D:\Anaconda\lib\site-packages\pip\req\req_set.py", line 469, in _prepare
_file
    session=self.session)
  File "D:\Anaconda\lib\site-packages\pip\download.py", line 825, in unpack_url
    session,
  File "D:\Anaconda\lib\site-packages\pip\download.py", line 673, in unpack_http
_url
    from_path, content_type = _download_http_url(link, session, temp_dir)
  File "D:\Anaconda\lib\site-packages\pip\download.py", line 884, in _download_h
ttp_url
    file_path = os.path.join(temp_dir, filename)
  File "D:\Anaconda\lib\ntpath.py", line 85, in join
    result_path = result_path + p_path
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc8 in position 7: ordinal
not in range(128)